湖北省鸡大肠杆菌病流行情况调查及其病原分离鉴定

Investigation of Epidemic Situation and Isolation andIdentification of Chicken's Escherichia Cloi in Hubei Province

该试验调查了湖北省集约化鸡场１９９２－１９９６年大肠杆菌病流行情况，共调查２９个鸡场１３６８１０只发病鸡群，共有３６１６５只鸡发病，发病率为２６．４３％，共死亡１１９０８只鸡，死亡率为８．７％，最高死亡率为３４％，最低死亡率１．７％，主要表现症状为：雏鸡败血症和与其它病混合杂；青年鸡呼吸道症状、关节炎、肠炎、全眼球炎；成年鸡腹膜炎、卵巢炎以及肠系膜、盲肠等处肉芽肿。共分离出１８株鸡大肠杆菌。

:Escherichia Coli of intensive chicken farm was investigated in Hubei province from1992 to 1996. 29 chicken farms (totalled 136810 chickens)were investigated and 36165 chick-ens were ill, morbidity was 26. 43% ,11908 chickens were died and mortality was 8. 7%. Thehighest mortality was 34% and the least was 1.7%. The main clinical sigas:Chicklings ex-pressed septicemia and other dieses infected mixturely; young chickens showed respiratorytract signs, arthitis, enteritis and inflammation of egeball; adult chickens expressed peritoni-tis, oophoritis and granulomas of mesentery and cecum. Eighteen strains of E. coli were iso-lated. They belonged to serotype O78、O2 and O1,they occupied 38. 8%, 16. 7% and 11% sepa-rately. They were cultivated in broth, then inoculated little white mice and 4-old-day chick-ens, half of the little mice died in 48 hours and 30% of the chickens died in a week. Other chickens alive could be seen typical E. coli signs.